EP1026971A1 - Verfahren und vorrichtung zur herstellung von borstenerzeugnissen - Google Patents
Verfahren und vorrichtung zur herstellung von borstenerzeugnissenInfo
- Publication number
- EP1026971A1 EP1026971A1 EP98959773A EP98959773A EP1026971A1 EP 1026971 A1 EP1026971 A1 EP 1026971A1 EP 98959773 A EP98959773 A EP 98959773A EP 98959773 A EP98959773 A EP 98959773A EP 1026971 A1 EP1026971 A1 EP 1026971A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bristle
- cords
- base plate
- brush
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000004033 plastic Substances 0.000 claims abstract description 22
- 229920003023 plastic Polymers 0.000 claims abstract description 22
- 238000001746 injection moulding Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims description 51
- 238000002347 injection Methods 0.000 claims description 49
- 239000007924 injection Substances 0.000 claims description 49
- 230000008569 process Effects 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 244000007853 Sarothamnus scoparius Species 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims 1
- 229920006126 semicrystalline polymer Polymers 0.000 claims 1
- 238000009966 trimming Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 abstract description 9
- 239000000047 product Substances 0.000 description 14
- 239000004743 Polypropylene Substances 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 229920002292 Nylon 6 Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- -1 polypropylene Polymers 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UNILWMWFPHPYOR-KXEYIPSPSA-M 1-[6-[2-[3-[3-[3-[2-[2-[3-[[2-[2-[[(2r)-1-[[2-[[(2r)-1-[3-[2-[2-[3-[[2-(2-amino-2-oxoethoxy)acetyl]amino]propoxy]ethoxy]ethoxy]propylamino]-3-hydroxy-1-oxopropan-2-yl]amino]-2-oxoethyl]amino]-3-[(2r)-2,3-di(hexadecanoyloxy)propyl]sulfanyl-1-oxopropan-2-yl Chemical compound O=C1C(SCCC(=O)NCCCOCCOCCOCCCNC(=O)COCC(=O)N[C@@H](CSC[C@@H](COC(=O)CCCCCCCCCCCCCCC)OC(=O)CCCCCCCCCCCCCCC)C(=O)NCC(=O)N[C@H](CO)C(=O)NCCCOCCOCCOCCCNC(=O)COCC(N)=O)CC(=O)N1CCNC(=O)CCCCCN\1C2=CC=C(S([O-])(=O)=O)C=C2CC/1=C/C=C/C=C/C1=[N+](CC)C2=CC=C(S([O-])(=O)=O)C=C2C1 UNILWMWFPHPYOR-KXEYIPSPSA-M 0.000 description 1
- 208000032544 Cicatrix Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000037387 scars Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14385—Coating a portion of a bundle of inserts, e.g. making brushes
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46D—MANUFACTURE OF BRUSHES
- A46D1/00—Bristles; Selection of materials for bristles
- A46D1/08—Preparing uniform tufts of bristles
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46D—MANUFACTURE OF BRUSHES
- A46D3/00—Preparing, i.e. Manufacturing brush bodies
- A46D3/04—Machines for inserting or fixing bristles in bodies
Definitions
- the invention relates to a method and a device for the production of bristle certificates, such as brushes, brooms, brushes and the like, using endless bristle cords, the brushes of which are injected from plastic, the bristle bundles as tips of the endless, through bores in the base plate of the injection mold bristle cords inserted into the mold interior can also be cast in.
- anchor process that is predominantly used in brush production, which is to be assumed as an example in the following, in which bristle bundles are placed in prefabricated / predrilled brush bodies. Stuck in with the help of a bristle tamping machine and attached to the base of the hole with wire or plate anchors has many disadvantages.
- bristle bundles of endless bristle strings made of plastic are used for brush goods, in that the line tips are guided through bores in the base plates of the injection mold into the interior of the mold and are injected into the brush body without further processing during injection molding .
- DE 44 39 431 A1 discloses a method for producing brush bodies with a bristle field for toothbrushes that are formed in some areas from at least two plastic components.
- bristle bundles that are already cut to length and assembled into bristle fields are injected into a bristle holder in a first step in the production of the brush body. So it is not assumed that endless bristle strings are used.
- the bristle bundles are frictionally inserted into the bristle holder, the assembly of which is to take place outside the tool in separate operations.
- DE-PS 845 933 discloses the separation of toothbrushes when the injection mold is open using a rotating cutting disc, the toothbrushes not being held firmly during the separation process, for example by an intermediate plate or another holding device.
- the separation of the finished brush products from the bristle brushes without bringing about a stable position of the brush body, such as it is proposed in this document is extremely difficult due to the actual processes involved in such separation processes.
- the lack of a stable position of the brush bodies during the cutting process makes the possibility of a cut across the entire bristle field highly doubted.
- the brush bodies can inevitably be torn out of their positioning during the cutting process and swirled around in the tool, making stable production processes virtually impossible.
- the method according to the invention ensures that the requirements for a high-quality brush product, such as a smooth, flat base surface and an intimate, preferably materially encased, coating of the injected bristle ends and thus a stable attachment of the bristles in the brush body are met.
- the solution to the task and the achievement of the aforementioned goal requires the lowest possible viscosity of the spray compound and the highest possible pressure in order to achieve the highest possible injection speed and to avoid heat losses.
- This is achieved according to the invention in that in the first stage of the multi-stage spraying process which produces the seal, plastic material is introduced into the mold interior at a speed of over 100 mm / s and a pressure of over 1.5 ⁇ 10 8 Pa.
- This layer which brings about the sealing, which is initially very thin, and consequently also very sensitive, particularly in the area of the bristle strings, can, however, up to a certain pressure range, be a sufficient barrier at the transitions of the Bristle cords can be used for the holes in the base plate in front of the spraying compound in the following injection stages.
- the course of the spray was stretched in time according to the invention, so that the last injection stage, filling the mold interior of the tool, was placed in a range of approximately 2.5 to 9 s after the start of spraying, in accordance with the tests carried out.
- the build-up of a dynamic pressure is made more difficult or prevented according to the invention by reducing the injection pressure to values below 4 ⁇ 10 7 Pa in conjunction with reducing the injection speed.
- the temperature of the spray material for the brush body is according to the invention very high ranges and above the flow temperature (FT) or the crystallite melting temperature (KT) (applicable for crystalline or partially crystalline polymers) of the bristle material.
- PA 6 polyamide 6
- PP polypropylene
- this spray technique succeeds in preventing the tendency to spray through in the area of the bristle strings in a simple manner without extensive additional technological effort. In order to achieve this effect, no special pressing of the bristle bundle in the holes in the base plate is required.
- the cutting plane of the cutting knife is placed at a distance from the base plate, which it overcomes the relatively high cutting resistance of the Bristle strings are opposed to the cutting knife, still allows to use the inner stiffness of the bristle strings.
- This distance is defined by the inner stiffness of the bristle material, the diameter of the filaments, the thickness of the bristle cords and the stable guidance of the bristle cords in the holes in the base plate and is determined empirically. The results so far show that this distance lies between two and three times the diameter of the bristle cords.
- the invention uses a cutting device known per se, which has an electric motor, a reduction gear and an eccentric, with which a reciprocating flat cutting knife is driven.
- the device is lowered centrally in the injection mold between the bristle fields in guideways transverse to the direction of movement of the cutting knife after opening the tool.
- Fig. 1 the side view of an open, consisting of the upper part, lower part and intermediate plate injection mold with an integrated separating device
- Fig. 2 the top view of the lower part of the injection mold, which is equipped with two modules for the production of hand wash brushes
- Fig. 4 the closed injection mold with the material of the brush body introduced in the first injection stage for sealing the holes in the base plate of the injection mold
- polypropylene is used as the plastic mass for the brush body and polyamide 6 for the bristle material for the production of hand-washing brushes.
- the injection mold shown schematically in Fig. 1 is installed in a known manner in an injection molding machine and consists essentially of base plate 5, intermediate plate 11, cover plate 12 and a separating device 4, with a separating knife 10, the eccentric 15 and a reduction gear.
- the intermediate plate 11 integrated in the injection mold and with its inner contour forming the outer contour of the brush body 14, and the base plate 5, which separate the divided base plates 8; 9 receives, are arranged movable to the cover plate 12.
- the endless bristle cords 2 are formed by the perforated base plates 8 consisting of two mutually displaceable plates; 9 - Fig. 3 passed and, except in the phase of the tool opening, jammed and protrude into the mold interior 1 - Fig. 4 in a length as they are to be injected into the brush body 14.
- a volume of plastic mass for example approximately 60% of the volume of the brush body 14 is passed through the hot runner 6 into the mold interior with an injection pressure of approximately 1.5 ⁇ 10 8 Pa and a spraying speed of 100 mm / s 1 injected that they cover the perforated surface of the base plate 9, including the tips of the bristle cords 2 protruding into the mold interior 1, with plastic compound 13 - FIG. 4 - but without completely filling the mold interior 1.
- the injection speed is reduced, for example, to values of 30 mm / s, 10 mm / s, 4 mm / s to 2 mm / s in the last injection stage.
- a zone of taut bristle cords 2 is thus created between the brush body 14 and the base plate 8, 9, which in the predetermined cutting plane 7, in free space, from the separating device 4 with a separating knife 10, in a cut to be carried out without counter-cutting, from the bristle cords 2 for the next product.
- the appropriate distance of the cutting plane 7 of the separating knife 10 from the base plate 9 is determined by placing the cutting plane 7 at a distance from the base plate 9 which still allows the internal stiffness of the bristle cords 2 to be used for the separating cut.
- a Thickness of the filaments made of PA 6 of 0.3 mm, a diameter of the bristle cords 3 of 2.2 mm defined a cutting plane 7 with a distance of 6.0 mm to the base plate 9.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Brushes (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997148925 DE19748925C2 (de) | 1997-10-30 | 1997-10-30 | Verfahren zum Abschneiden von Borstenfeldern bei der Herstellung von Bürstenerzeugnissen aus Kunststoff und Vorrichtung dafür |
DE19748925 | 1997-10-30 | ||
DE19754762 | 1997-11-28 | ||
DE1997154762 DE19754762C1 (de) | 1997-11-28 | 1997-11-28 | Verfahren zur Herstellung von Borstenerzeugnissen unter Nutzung endloser Borstenschnüre |
PCT/DE1998/003166 WO1999022623A1 (de) | 1997-10-30 | 1998-10-26 | Verfahren und vorrichtung zur herstellung von borstenerzeugnissen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1026971A1 true EP1026971A1 (de) | 2000-08-16 |
EP1026971B1 EP1026971B1 (de) | 2002-05-15 |
Family
ID=26041353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98959773A Expired - Lifetime EP1026971B1 (de) | 1997-10-30 | 1998-10-26 | Verfahren und vorrichtung zur herstellung von borstenerzeugnissen |
Country Status (5)
Country | Link |
---|---|
US (1) | US6578927B1 (de) |
EP (1) | EP1026971B1 (de) |
AU (1) | AU1555799A (de) |
ES (1) | ES2177106T3 (de) |
WO (1) | WO1999022623A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19943599A1 (de) * | 1999-09-11 | 2001-03-15 | Zahoransky Anton Gmbh & Co | Bürstenherstellungsmaschine |
US6588851B1 (en) | 2000-05-26 | 2003-07-08 | Kenan Bible | Clamp for retaining bristle bundles of various sizes |
DE10033256A1 (de) * | 2000-07-10 | 2002-01-24 | Coronet Werke Gmbh | Verfahren und Vorrichtung zur Herstellung von Borstenwaren sowie Borstenware |
DE10207019A1 (de) | 2002-02-20 | 2003-09-11 | Braun Gmbh | Klemmvorrichtung und Verfahren zum Festhalten von Filamentbüscheln |
CN103331871B (zh) * | 2013-06-08 | 2015-07-29 | 绍兴县滨海塑料制品厂 | 扫把头、制备扫把头的模具及扫把头加工工艺 |
CN111933360B (zh) * | 2020-07-31 | 2021-10-22 | 广东朝阳电子科技股份有限公司 | 制作带sr扣的耳机线材的方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE293718C (de) | ||||
US2643158A (en) * | 1947-06-25 | 1953-06-23 | Columbia Protektosite Co Inc | Method of making molded brushes |
US2655409A (en) | 1947-07-05 | 1953-10-13 | Columbia Protektosite Co Inc | Art of and apparatus for molding brushes |
DE845933C (de) | 1949-07-28 | 1953-06-11 | Maximilian Schiffer | Verfahren und Maschine zum Herstellen von Buersten, insbesondere von Zahnbuersten |
FR1462272A (fr) * | 1965-09-03 | 1966-04-15 | Procédé de fabrication de brosses, dispositif pour la mise en oeuvre de ce procédé et brosse en résultant | |
FR1453829A (fr) | 1965-03-05 | 1966-07-22 | Procédé de fabrication de brosses et analogues | |
US3610692A (en) * | 1970-03-03 | 1971-10-05 | Hendrik R Van Der Molen | Apparatus for making brushes |
EP0142885B1 (de) | 1983-11-16 | 1991-02-06 | Anchor Advanced Products, Inc. | Verfahren zur Herstellung von Bürsten mit Selbstbefestigung der Borsten sowie nach diesem Verfahren hergestellte Bürsten |
EP0149996A3 (de) | 1984-01-10 | 1987-10-21 | Schlesinger GmbH & Co. Maschinenbau KG | Verfahren und Maschine zum Herstellen von Bürsten |
DE3505972A1 (de) | 1985-02-21 | 1986-08-21 | Coronet - Werke Heinrich Schlerf Gmbh, 6948 Wald-Michelbach | Verfahren und vorrichtung zur herstellung von borstenwaren |
DE4439431A1 (de) | 1994-11-04 | 1996-05-09 | Schiffer Fa M & C | Verfahren und Vorrichtung zur Herstellung von Bürstenkörpern aus mindestens zwei Kunststoffkomponenten |
-
1998
- 1998-10-26 AU AU15557/99A patent/AU1555799A/en not_active Abandoned
- 1998-10-26 ES ES98959773T patent/ES2177106T3/es not_active Expired - Lifetime
- 1998-10-26 US US09/530,456 patent/US6578927B1/en not_active Expired - Fee Related
- 1998-10-26 EP EP98959773A patent/EP1026971B1/de not_active Expired - Lifetime
- 1998-10-26 WO PCT/DE1998/003166 patent/WO1999022623A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9922623A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6578927B1 (en) | 2003-06-17 |
WO1999022623A1 (de) | 1999-05-14 |
EP1026971B1 (de) | 2002-05-15 |
AU1555799A (en) | 1999-05-24 |
ES2177106T3 (es) | 2002-12-01 |
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